A gear of radius 4.6cm turns at 3 revolutions per second

Find an equation of the line perpendicular to the graph.

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed